Jineon Baek
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 Nov17 awarded Good Question Jul25 accepted Graph containing every trees of size $n$ as subgraphs Jul25 answered Graph containing every trees of size $n$ as subgraphs Jul25 answered prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ Jul25 comment prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ For your idea, just add up all inequalities of type $a^2+b^2 \geq 2ab$. Jul25 revised prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ added 269 characters in body Jul25 comment prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ @Macavity You're right. $f$ is not convex. Your second comment seems to work. Jul25 revised prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ added 299 characters in body Jul25 answered prove $\sum\limits_{cyc} \frac {a^3} {b+c+d} \geq \frac {1} {3}$ Jul23 comment Graph containing every trees of size $n$ as subgraphs Thanks for this interesting conjecture. But what I'm asking is the minimum number of edges required for some graph, while the conjecture is asking for all graph. Jul22 awarded Yearling Jul22 asked Graph containing every trees of size $n$ as subgraphs Jul2 awarded Curious Feb1 awarded Popular Question Dec29 comment Dividing a deck of cards using only imagination @hunter Let the two players be A and B and two cards be 1 and 2. A simply choose her card uniformly from 1 and 2, and pass the other to B. Now the cards are distributed uniformly, and since each individual knows his card, knowing the opponent's card does not add to that information. Dec28 asked Dividing a deck of cards using only imagination Jul17 awarded Yearling Jun13 comment Mathematical (or physical) formulation of life Thanks for the recommendation! I will check that book too. Jun12 comment Mathematical (or physical) formulation of life @DejanGovc I knew the title, but didn't know of its content! Thanks for pointing me out the book. Jun12 comment Mathematical (or physical) formulation of life @SimonMarkett However I think it is not easy to describe how the life is emerged with the game of life. The patterns are designed carefully, and it seems hard to make them spontaneously from some initial state.